It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 409 498 is not a prime number.
For example, 409 498 can be divided by 2: 409 498 / 2 = 204 749.
For 409 498 to be a prime number, it would have been required that 409 498 has only two divisors, i.e., itself and 1.
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409 498 is an even number, because it is evenly divisible by 2: 409 498 / 2 = 204 749.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 409 498 is about 639.920.
Thus, the square root of 409 498 is not an integer, and therefore 409 498 is not a square number.
The square of a number (here 409 498) is the result of the product of this number (409 498) by itself (i.e., 409 498 × 409 498); the square of 409 498 is sometimes called "raising 409 498 to the power 2", or "409 498 squared".
The square of 409 498 is 167 688 612 004 because 409 498 × 409 498 = 409 4982 = 167 688 612 004.
As a consequence, 409 498 is the square root of 167 688 612 004.
The multiples of 409 498 are all integers evenly divisible by 409 498, that is all numbers such that the remainder of the division by 409 498 is zero. There are infinitely many multiples of 409 498. The smallest multiples of 409 498 are: